Pulling-over machine



March 11, 1930. A. NEUBERT PULLING-OVER MACHINE Filed Feb'. 28. 1928 e Sheets-Sheet ENE March 11, 1930. NEUBERT 1,750,421

PULLING-OVER MACHINE Filed Feb. 28. 1928 6 SheetsSheet 2 Jfi'oezz For" MW 4? was March 11, 1930. A. N EU BERT 1,750,421

PULLING-OVER MACHINE Filed Feb. 28, 1928 6 Sheets-Sheet 3 March 11, 1930. A. NEUBERT PULLING-OVER' MACHINE Filed Feb. 28, 1928 6 Sheets-Sheet 4 March 11, 1930. A. NEUBERT PULLING-OVER MACHINE Filed Feb. 28, 1928 6 Sheets-Sheet WWW March 11, 1930. A. NEUBERT PULLING-OVER MACHINE 6 Sheets-Sheei Filed Feb. 28, 1928 Jfflfllllllll llllllll I II II II I Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE AUGUST NEUBERT, OF WEISSENFELS-ON-THE-SAALE, GERMANY, ASSIGNOR TO THE FIRM OF NOLLESGI-IE WERKE KOMMANDIT GESELLSCHAFT, OF WEISSENFELS-ON- THE-SAALE, GERMANY PULLINGr-OVER MACHINE Application filed February 28, 1928, Serial No. 257,748, and in Germany March 5, 1927.

My invention relates to machines for pull provide an improved pulling-over machine,

whereby the process of shaping the upper to the last behind the ball can be performed with great accuracy.

An important feature of the present invention comprises a novel arrangement of the grippers acting at the joint of the shoe between the ball and the shank. This arrangement comprises means for adjusting the joint-grippers in accordance with the form of the last. This is obtained by swinging the joint-grippers in the arc of a circle the centre of which lies approximately where the grippers seize the upper. The'swinging plane is approximately vertical to the sole of the shoe. By these means the joint-pincers can be adjusted to exert the right pull to obviate the fullness and the wrinkling of the material at the joint between the ball and the shank, in the step-by-step lasting following the pulling-over operation.

These and other features of the invention will be herein described in connection with the accompanying drawings.

In the drawings:

Fig. 1 shows a shoe pulled-over with the new five grippers machine.

Fig. 2 is an elevation of the whole machine.

Figs. 3 and 4 are different views of the shank-grippers.

Fig. 5 illustrates the mechanism for closing and pulling down the grippers.

Figs. 6 and 7 show the driving means for moving the grippers inwardly.

' Figs. 8 and 9 show the means for moving the nailing devices.

The machine is provided with a toe-gripper A, two side grippers B, operating at the tip-line of the toe-cap and two grippers 0 operating at the joint. The grippers A and B are arranged in the machine-frame 1 1n the usual manner as for instance shown in Patent No. 1,688,556 of Ivan Riesz. But the arrangement of the joint-grippers C in the machine-frame is new, see Figs. 3, 4. On either side of the frame and of the place where the attendant stands there are provid ed segmental guides 22 curved in the arc of a circle. In these guides the carriers 26 of the grippers C can be adjusted by means of the hand-wheels 24 and the gears 23, 25. The centre of the segments lies approximately at the upper end of the grippers in the point E. By these means by the adjusting of the carriers in the segments the direction of pull of the grippers G is altered relatively to the sole of the last. The carriers 26 can be rotated about the studs ll of the slides 21 and fixed in their position in order to position the operating faces of the grippers G parallel to the edge of the joint of the last. The body 36 accommodating the grippers can be adjusted in the slide 35 laterally across the last by the hand wheel 38 and the screwspindle 37. The slide 35 itself can be raised and lowered by the hand-wheel 29. The toothed wheel 30 on the spindle 29 of the wheel 29 gears with the toothed wheels 27, 28 the shafts of which show screw-threads engaging the nuts 31, 32. These nuts are connected by the bars 33, 34 with the slide 35 so that by rotating the hand-wheel 29 the vertical position of the slide 35 and of the gripper O is adjusted. Moreover the whole pincer C can be moved along the last by means of the spindle 39 and of the hand-wheel 42.

Owing to all these adjustments the position of the grippers C can be adapted to the curved form of the joint independently of the grippers A and B, so that they exert a pull precisely over the shank in a direction dilfering from the direction of the pull at the toe-cap.

' Notwithstanding this independent and separate arrangement of the joint-grippers their drive is common to the other pincers too so that a uniform operation is obtained.

The grippers maybe of any construction. Inthe following description they are supposed to be constructed as shown in Fig. 4

of the said patent of Ivan Riesz. The grippers are closed and pulled down by the bars 40, see Fig. 5. Their inward swinging is obtained by the rods 76 and the nailing is effected by kicking up the bars 120. Every gripper-body is therefore associated to a threefold driving gear.

The bars 40 for closing and pulling down the grippers are directly or by means of an automatic gear as shown in the said copending application connected to treadles. The treadle 700 is provided for the toe gripper, the treadle 700 for the two grippers at the tip of the cap, and the treadle 700 for the joint-grippers. The treadles are moved one after the other down against the tension of springs, and are fixed in their lower position by pawls 708 engaging the ratchet-teeth 716. The arrangement and operation of this ratchet mechanism is shown in the appending Fig. 5.

All treadles are pivoted on the shaft 68. The treadle T00 of the toe gripper A is connected by the bar 81 to the lever 78 ournaled at 79 in the machine frame. The lever 78 carries the pawl 708. The treadle 700 is connected by the bar 69 to the lever '70 journaled at 71 in the frame. The lever carries the pawl 708 and the cross-lever 72 for the tension bars 40 of both side-grippers B. The treadle T00 is likewise connected to a rear-lever 70 and to a pawl by means of a bar 69 which is in this case arranged behind the plane of the drawing. The treadle T00 is connected to the tension-rods 40 by the bars 83 and the bell crank lever 84 pivoted on the shaft 85 arranged on the carriers 26. Before or after the nailing the grippers become opened by releasing of the pawls. The pawls are released by the slide moved by the grooved disc 5.

The movement of the rods 76 for swinging the grippers inwardly is effected by the grooved disc 4, see Figs. 6, 7, which oscillates the shaft 96 by means of the swinging lever 93 and the link 95. This shaft is connected at its rear end to the rod 76" for the toe-gripper and at its front end to the rod 76 for one of the side-grippers. The rod 76 for the other side gripper is connected to the shaft 96 which on its side is connected for a simultaneous oscillation to the shaft 96 by the rod 97. The shafts 96, 96 are connected by cranks 125 and rods 104 to the grooved. shafts 105 j ournaled within segment-guides 22. On these shafts slide the crank-arms 107 to which the tension-rods 76 are pivoted.

The nailing-devices. see Figs. 8 and 9 are driven by the cam-disc 5 on the circumference of which rides a roller 126 of the arm 109 of the shaft 110. The other arm 111 of this shaft is connected by the link 114 to the arm 114 of the shaft 118. Around the shaft 113 there is wound the driving spring 127 which tends to toss up the hammer bars 120 leading to the nail-drivers as soon as the roller of the arm 109 slides down from the projection on the circumference of the disc 5. There are as many arms 112 fastened on the shaft 118 as there are nailing devices. The arms 112 for the nailing devices associated with the shankgrippers are connected bylinks 117 and cranks to the grooved shafts 116 journaled in the segment-guides 22. The shafts 116 move the hannner-bars 120 by means of the arms 12].

The operation of the machine is on the whole similar to that of the usual pullingover machine. The grippers are at first closed and pulled down at the toe, then at the tip of the cap, and finally at the joint. The machine is started by operating the clutch 128 by means of the handle 122. The grippers and wipers move inwardly and lay the margin of the upper over the sole, the nailing devices fasten the margin of the stretched upper. wnereupon all devices return to their initial position.

it is essential that the grippers at the joint can be adjusted before they operate so as to assume the desired direction of pull over the shank. This adjustment necessitates their local separation from the other grippers. Nevertheless all grippers have common means for their automatic movements. The same of course applies to the wipers and nailing devices associated to the grippers.

Needless to say the shoe is carried by a support 129 while being operated upon by the grippers and it is pressed against the support by well known means during the nailing.

V hat I claim is:

1. In a machine for pulling-over shoes, the combination of a shoe-support, and grippers for operating upon the supported shoe at the rear of its ball with means for adjusting these grippers in curved paths running in vertical planes parallel to the longitudinal axis of the shoe support below the support about points ying approximately on the same level as the supporting face of the support.

2. In a machine for pulling-over shoes, the combination of a shoe-support and grippers for operating upon the supported shoe at the rear of its ball with means for adjusting these grippers in curved paths below the support about points lying approximately on the same level as the supporting face of the support, and means for adjusting them about an axis approximately vertical to the support.

3. In a machine for pulling-over shoes, the combination of a shoe-support and grippers for operating upon the supported shoe at the rear of its ball with means for adjusting these grippers in curved paths below the support about points lying approximately on the same level as the supporting face of the support, means for adjusting them about an axis approximately vertical to the support, and means for adjusting them along and across the support.

4. In a machine for pulling-over shoes, the combination of a shoe-support, grippers for operating upon the supported shoe at the rear of its ball and grippers for operating at the toe and at the tip-line of the shoe with means for adjusting the first named grippers in curved paths below the support about points lying approximately on the same level as the supporting face of support.

5. In a machine for pulling-over shoes, the combination of a shoe-support, grippers for operating upon the supported shoe at the rear of its ball, and grippers for operating at the toe and at the tip-line of the shoe, means for closing and pulling the grippers at the toe and at the tip-line of the shoe, and separate means for closing the grippers operating at the rear of the ball with means for adjusting the last named grippers in curved paths below the support about points lying approximately on the same level as the supporting face of support, and means common to all the grippers for moving them inwardly.

In testimony whereof I afiix my signature.

AUGUST NEUBERT. 

